FBD9 Duplicates Withholding information

Hi All,

I have created a recurring document , by using FBD1 T-CODE.  - Screenshoot 1

This vendor 10000433 have linked withholding tax accounting in Master data section:- Screenshoot 2

Now I run FBD5 using Post with reference:- screenshoot 3

I fill required fields, but when I simulate document - screenshoot4

I do not understand why system computes withholding information twice?

Thanks

Jose